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9.4.4.3.(1)
OS2OP2OH1OH4OS3
ObjectiveOP2 Structural Sufficiency of the Building
Attribution
[F20-OP2.3] Applies to elements that support or are part of an environmental separator.
Application
Application 1: 
Design capacity of foundations, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], where the foundation bears on gravel, sand or silt, and the water table is within a distance below the bearing surface equal to the width of the foundation.
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Intent
Intent 1: 
For coarser soil types near the footings' bearing surface (for which free water between soil particles can reduce bearing capacity), to limit the probability of excessive soil subsidence, which could lead to the cracking of foundations or building superstructures.
This is to limit the probability of compromised structural integrity, which could lead to:
  • structural failure,
  • for environmental separators or elements supporting environmental separators, the displacement or failure of required environmental separation elements, which could lead to the deterioration of building elements, which could lead to further compromised structural integrity, or
  • an inability to resist expected loads, which could lead to
    • excessive deformation or deflection of walls, or
    • excessive deflection or vibration of floors.
This is to limit the probability of:
  • the space being unsuitable for its intended use, or
  • damage to the building.
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